Drag-scraper.



K. K. BRADDOGK.

v DRAG SURAPBR. APPLICATION FILED FEB. 21, 1910.

Patented Aug. 16, 1910.

2 SHEETS-SHEET 1.

K. K. BRADDOCK.

DRAG SCRAPER. ArPLIoATIoN FILED IBB. zi. 1910.

Patented Aug. 16, 1910.

` 2 Mmmm-SHEET z.

Wudesses;

KENT K. BRADIDOCK, OF SAN FRANCISCO, CALIFORNIA.

DRAG-SCRAPER.

Specification of Letters Patent.

Patented Aug. 16, 1910.

Application filed. February 21, 1910. Serial No. 544,976.

State of California, have invented new and.

useful Improvements in Drag- Scrapers, of which the following is a specification.

This invention relates to drag Scrapers and particularly pertains to scrapers such as are employed in moving and leveling earth in railroad construction and other eX- cavating or dredging operations.

It is the object of this invention to provide a practical scraper having means by which it may be loaded, moved, dumped, and handled automatically from a remote point, and which is substantial in construction and efficient in operation.

The invention consists of the parts and the construction and combinations of parts as hereinafter more 4fully described and claimed, having reference to the accompanying drawings, in which* Figure 1 is a side view of the invention in a normal position. Fig. 2 is a plan view of the same with a portion broken away.

Fig. 3 is a diagram illustrating the operation of the tripping device. Figs. il, 5 and 6 are diagrams showing the invention in the various positions assumed in operation.

In the drawings A represents the body of the scraper which is constructed of suitable material, as sheet metal in box-like form, open on the top and on the front side. The forward edge of the bottom of the scraper A is reinforced with a cutter plate B, which is beveled on its outer edge to form a blade C.

The plate B is inclined upwardly toward its outer edge C and when rock-containing earth is to be handled it is provided with removable teeth D, which may be of any suitable number or design.

Mounted on the rear of the scraper body A is a horizontally disposed shaft 2, which extends the width of the scraper A and may be either' rigidly or revolubly secured thereto.

Revolubly suspended on each end of the shaft 2 are sled-runners 3, a detail of which is shown in Fig. 3, and which are adapted to extend forward beneath the bottom of the scraper A, as shown in Fig. l, thus supporting the latter above the surface of the ground. These runners 8 may be constructed in any suitable manner, and are preferably formed with a wide bearing surface, which is curved upward at the rear of the runner, as shown, and pivots on the fulcruln rod or shaft 2.

Fivoted at et on the inner side of each runner 3 at a point forward of and below the shaft 2 is a tongue or link 5, the outer ends of lthe tongues 5 being connected to a rod or yoke 6. A cable 7 has one end secured to the outer ends of the rod 6 through a crotch 8, as shown in Fig. 2, and passes around the respective outhaul and inhaul pulleys 9, 9', Fig. 1, and has its other end secured to the outer end of a crotched dumping lever or forked arm 10, which is pivotally mounted on the shaft Q.

An outhaul cable 11 attached to the pulley 9 extends in a direction rearward of the scraper A and passes around suitable direction pulleys 12 and leads to a winding drum 13, as shown in diagram in Figs. 4f, 5, 6. From drum 13 leads back an inhaul cable 14 toward the forward end of the scraper A, and is connected with the pulley block 9. The inhaul cable 14: is also connected direct to the front of the scraper by a short section of cable 15 and the bail 1G. These cables 11 and 14 are adapted to be wound upon the drum 13 from either direction, one paying out as the other winds in. Drum 13 may be revolved by any suitable means Aand any desired type of winding drum, or series of drums, may be employed, as will be found expedient in the class of work the scraper is to perform.

The operation of the invention is as follows: After dumping a load, to pull the scraper back to be put in position to scrape up a fresh load, the scraper is in the position shown in Figs. 1-6, with the scraper body A resting upon the sled-runners 3; the cable 11 being wound upon the drum 13 so as to exert a pull in the direction of the arrows in Fig. 6. As the cable 11 is wound upon the drum 13, the inhaul cable lt corwv respondingly unwinds. The scraper' A is thus dragged to a position beyond the point from which it desired to remove earth or other material, whereupon the drum 13 is reversed so as to pull upon the cable la in the direction indicated by the arrows in Fig. et. This causes the block 9 to move forward so as to pull upon the cable 7, which pull causes the dumping arm 10 to move upward and, by reason of a direct pull on the tongue 5, causes the forward ends of the runners to move in a downward direction, thus raisin'g the rear side of the scraper A into the position shown in Fig. 4. In this position the forward edge or blade C of the scraper A is made to dig into the earth. Continued pull upon the cable 14 exerts a pull on the forward side of the scraper through the cable l5, drawing the scraper forward and scooping up a load of earth. The forward movement of the scraper A and cable 14 causes the runners to upset, as shown in Fig. 5, and pulls the arm l0 into a vertical position and in contact with the back of the scraper A. In this position the forward pull of the cable 14 is transmitted direct to the scraper body A, through the short cable l5 and the arm 10, so as to drag the scraper forward in horizontal position (Fig. 5) until the desired dumping point is reached.

Vhen it is desired to dump the scraper A, the parts being in the position shown in Fig. 5, the drum 13 is reversed, bringing tension upon the outhaul cable Il so as to retard the forward movement of the runners temporarily, and so pulling back upon the tongues 5, in opposition to the forward movement of the lever arm l0, and also drawing the block 9 against the lever 10 so as to slack the shortcable l5. This action causes the for-V ward edge of the' scraper to move downward while the rear portion is moved upward and forward, the shaft 2 acting as a pivotal point until the position shown in dotted lines in F ig. is reached. In this position theY bottom of the scraper is more or lessvertically disposed and causes the contents of the scraper to empty.

To restore the emptied scraper to the return unloaded position shown in Figs. l and G, the cable 14 is slaeked and cable ll wound up, the runners first digging into the ground and then turning over into position, as shown in Fig. 6. A

From the foregoing it will be seen that this invention is particularly adapted to dredging inland ponds, lakes and like bodies of water, as the, loading and dumping of the apparatus arecontrollable from the shore, thus enabling dredging operations to be carried on at a distance, which is limited only by the stretch or span of the cable 1l and power of the motive engine. It will be manifest, however, that the invention is not limited to any particular use, but it can be employed for excavating and grading purposes generally.

Having thus described my invention, what I claim and desire to secure by Letters-Patent, is:

l. The combination of a scraper, inhaul and outhaul cables, and connections between the cables with means, whereby on the reversing of the direction of travel of said cables the bucket is tilted.

2. The combination with a scraper, of inhaul and outhaul cables, flexible connections between the cables and also between the scraper and each of the cables, and means operative by said connections between the cables whereby on the reversal of the direction of travel of the scraper the latter is given an initial tilting movement.

3. The combination with a scraper, of runners pivoted thereto, an outhaul cable connected to the runners, an inhaul cable connected to the scraper and also flexibly eonnected with the outhaul cable, and a dumping lever pivoted to the scraper and connected with said flexible connections between the cables.

4. The combination of a scraper, runners pivoted thereto, a dumping lever pivoted to the scraper adjacent to the pivot of the runners, flexible connections between the run`- ners and said dumping lever, pulleys through which said flexible connections run, an out-haul cable connected with one pulley, an inhaul pulley connected to the other pulley, and flexible connections between the in` haul cable and the front of the scraper.

5. The combination of a scraper open at the front end, a runner pivoted to the back of the scraper and extendible underneath and adapted to support the scraper, an inhaul cable connected with the front of the scraper, and an outhaul cable connected with the runner.

G. The combination with a scraper open at the front, of a curved runner pivoted to the back of the scraper, and on which runner the scraper is adapted to be supported and about which said scraper may also turn on a fulcrum, a dumping lever pivoted to thc scraper adjacent to the pivot of the ruimer, a cable connected to the runner eccentric of' the pivot of the runner, inhaul and outhaul cables loosely connected with said flexible connections, and a flexible connection be tween the front of the scraper and the inhaul cable.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

KENT K. BRADDOCK.

C. M. OAK. 

